Adds components/history tests to BUILD.gn

components/history/core/browser/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 static_library("browser") {
   sources = [
     "delete_directive_handler.cc",
     "delete_directive_handler.h",
     "download_constants.h",
     "download_database.cc",
@@ skipping 110 matching lines @@
       "android/sql_handler.h",
       "android/urls_sql_handler.cc",
       "android/urls_sql_handler.h",
       "android/visit_sql_handler.cc",
       "android/visit_sql_handler.h",
     ]
   }
 
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 }
+
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "expire_history_backend_unittest.cc",
+    "history_backend_db_unittest.cc",
+    "history_backend_unittest.cc",
+    "history_database_unittest.cc",
+    "history_querying_unittest.cc",
+    "history_service_unittest.cc",
+    "history_types_unittest.cc",
+    "thumbnail_database_unittest.cc",
+    "top_sites_cache_unittest.cc",
+    "top_sites_database_unittest.cc",
+    "top_sites_impl_unittest.cc",
+    "typed_url_syncable_service_unittest.cc",
+    "url_database_unittest.cc",
+    "url_utils_unittest.cc",
+    "visit_database_unittest.cc",
+    "visit_filter_unittest.cc",
+    "visit_tracker_unittest.cc",
+  ]
+  deps = [
+    ":browser",
+    "//base",
+    "//base:prefs_test_support",
+    "//base/test:test_support",
+    "//components/favicon_base",
+    "//components/history/core/common",
+    "//components/history/core/test",
+    "//sql",
+    "//sql:test_support",
+    "//sync:test_support_sync_api",
+    "//testing/gtest",
+    "//ui/gfx:gfx",
+    "//url",
+  ]
+  if (is_android) {
+    sources += [ "android/android_history_types_unittest.cc" ]
+  }
+}